<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>9.错误</title>
    <script src="9.错误.js"></script>
</head>
<body>
<button id="func_message" onclick="funcmessage(2)">点击消息</button>

<form>
    <input id="x"> + <input id="y">
    <button id="calc" type="button" onclick="buttonClick()">计算</button>
</form>

</body>
</html>